So I had a little time this morning to put together a chart combining transmission gearing of 6-speed vs 8-speed, diff ratios, and tire sizing into an overall gearing reference. Hoping this will be useful for those trying to understand how their changes are going to effect overall gearing of the setup.
EDIT: Adding additional reference info
Few notes:
1) Yellow and Red denote marginal to poor ratios for the setup
2) Even with 37s, the 8-speed first gear gearing is better than the stock 6-speed gearing with 31s!
3) The 8-speed has a huge gearing span. With an ultra low first gear enough to tug anything stock. This would also benefit crawl ratios in low range. 6-speed: 34.1:1, 8-speed: 41.5:1. For comparison: 4Runner 34:1, Wrangler 39:1, Rubicon Wrangler 73:1
Engine RPMs at 55, 65, and 75mph
EDIT: Adding additional reference info
Few notes:
1) Yellow and Red denote marginal to poor ratios for the setup
2) Even with 37s, the 8-speed first gear gearing is better than the stock 6-speed gearing with 31s!
3) The 8-speed has a huge gearing span. With an ultra low first gear enough to tug anything stock. This would also benefit crawl ratios in low range. 6-speed: 34.1:1, 8-speed: 41.5:1. For comparison: 4Runner 34:1, Wrangler 39:1, Rubicon Wrangler 73:1
Engine RPMs at 55, 65, and 75mph
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